How to enable SSL on a web site in IIS

1. Open IIS.
2. Click the root node in the tree view at the left.
3. Double click Server Certificates.
4. In the list on the right, choose either Create Self Signed Certificate or Import.
5. Click the site you want to secure.
6. Click Bindings on the right and click Add.
7. Choose https and select the certificate in the drop down list.

That's it.  Now you're site is listening on port 443 (default for https requests).  If you're using a self-signed certificate, your browser will throw up all kinds of red flags, but you are encrypted now.

Lots of good info here.